/* 
A* -------------------------------------------------------------------
B* This file contains source code for the PyMOL computer program
C* copyright 1998-2000 by Warren Lyford Delano of DeLano Scientific. 
D* -------------------------------------------------------------------
E* It is unlawful to modify or remove this copyright notice.
F* -------------------------------------------------------------------
G* Please see the accompanying LICENSE file for further information. 
H* -------------------------------------------------------------------
I* Additional authors of this source file include:
-* 
-* 
-*
Z* -------------------------------------------------------------------
*/
#include"os_python.h"

#include"os_predef.h"
#include"os_std.h"

#include"Base.h"
#include"Vector.h"
#include"MemoryDebug.h"
#include"Err.h"
#include"Setting.h"
#include"Scene.h"
#include"Ray.h"
#include"ObjectDist.h"
#include"Selector.h"
#include"PConv.h"
#include"ObjectMolecule.h"
#include"Feedback.h"
#include"DistSet.h"
#include"ListMacros.h"
#include "Interactions.h"
#ifdef _PYMOL_INCENTIVE
#endif

static void ObjectDistUpdateExtents(ObjectDist * I);

int ObjectDistGetLabelTxfVertex(ObjectDist * I, int state, int index, float *v)
{
  int result = 0;
  if(!I->DSet.empty()) {
    if(state < 0)
      state = SettingGet_i(I->G, NULL, I->Setting.get(), cSetting_state) - 1;
    if(state < 0)
      state = SceneGetState(I->G);
    if(I->DSet.size() == 1)
      state = 0;                /* static singletons always active here it seems */
    state = state % I->DSet.size();
    {
      DistSet *ds = I->DSet[state].get();
      if((!ds) && (SettingGet_b(I->G, I->Setting.get(), NULL, cSetting_all_states))) {
        state = 0;
        ds = I->DSet[state].get();
      }
      if(ds) {
        result = DistSetGetLabelVertex(ds, index, v);
      }
    }
  }
  return (result);
}

int ObjectDistMoveLabel(ObjectDist * I, int state, int index, float *v, int mode, int log)
{
  int result = 0;
  /* determine which state we're using */
  if(state < 0)
    state = 0;
  if(I->DSet.size() == 1)
    state = 0;
  state = state % I->DSet.size();
  if((!I->DSet[state])
     && (SettingGet_b(I->G, I->Setting.get(), NULL, cSetting_all_states)))
    state = 0;
  /* find the corresponding distance set, for this state */
  auto ds = I->DSet[state].get();
  if(ds) {
    result = DistSetMoveLabel(I->DSet[state].get(), index, v, mode);
    /* force this object to redraw itself; invalidate the Label's coordinates
     * with the new data set, ds */
    ds->invalidateRep(cRepLabel, cRepInvCoord);
    /*      ExecutiveUpdateCoordDepends(I->G,I); */
  }
  return (result);
}


/* ObjectDistMoveWithObject -- updates the vertex positions of a distance measure
 *
 * PARAMS
 *   (ObjectDist*) I
 *     the object to update
 *   (ObjectMolecule*) O
 *     the object that moved, causing this function to be called
 * RETURNS
 *   (integer) 0=nothing moved; 1=something moved
 */
int ObjectDistMoveWithObject(ObjectDist * I, struct ObjectMolecule * O) {
  int result = 0, curResult = 0;

  /* bail if the distance object is empty, or it doesn't have any distances */
  if (!I || I->DSet.empty() ) {
    return 0;
  }

  /* ask each DistSet to move itself, if required */
  for (int i=0; i<I->DSet.size(); i++) {
    auto ds = I->DSet[i].get();
    if (ds) {
      curResult = DistSetMoveWithObject(ds, O);
      result |= curResult;
    }
  }
	
  PRINTFD(I->G, FB_ObjectDist) " ObjectDist-Move: Out of Move\n" ENDFD;
  return result;
}
/* -- JV end */


/*========================================================================*/

void ObjectDistUpdateExtents(ObjectDist * I)
{
  float maxv[3] = { FLT_MAX, FLT_MAX, FLT_MAX };
  float minv[3] = { -FLT_MAX, -FLT_MAX, -FLT_MAX };

  /* update extents */
  copy3f(maxv, I->ExtentMin);
  copy3f(minv, I->ExtentMax);
  I->ExtentFlag = false;
  for(int a = 0; a < I->DSet.size(); a++) {
    auto ds = I->DSet[a].get();
    if(ds) {
      if(DistSetGetExtent(ds, I->ExtentMin, I->ExtentMax))
        I->ExtentFlag = true;
    }
  }
}

static PyObject *ObjectDistDSetAsPyList(ObjectDist * I)
{
  auto result = PyList_New(I->DSet.size());
  for(int a = 0; a < I->DSet.size(); a++) {
    if(I->DSet[a]) {
      PyList_SetItem(result, a, DistSetAsPyList(I->DSet[a].get()));
    } else {
      PyList_SetItem(result, a, PConvAutoNone(Py_None));
    }
  }
  return (PConvAutoNone(result));
}

static int ObjectDistDSetFromPyList(ObjectDist * I, PyObject * list)
{
  int ok = true;
  if(ok)
    ok = PyList_Check(list);
  if(ok) {
    I->DSet.resize(PyList_Size(list));
    for(int a = 0; a < I->DSet.size(); a++) {
      if(ok){
	CPythonVal *val = CPythonVal_PyList_GetItem(I->G, list, a);	
        I->DSet[a].reset(DistSetFromPyList(I->G, val));
	CPythonVal_Free(val);
      }
      if(ok && I->DSet[a])
        I->DSet[a]->Obj = I;
    }
  }
  return (ok);
}

/*========================================================================*/
PyObject *ObjectDistAsPyList(ObjectDist * I)
{
  PyObject *result = NULL;

  /* first, dump the atoms */

  result = PyList_New(4);
  PyList_SetItem(result, 0, ObjectAsPyList(I));
  // for backwards compatibility
  PyList_SetItem(result, 1, PyInt_FromLong(I->DSet.size()));
  PyList_SetItem(result, 2, ObjectDistDSetAsPyList(I));
  PyList_SetItem(result, 3, PyInt_FromLong(0));

  return (PConvAutoNone(result));
}

int ObjectDistNewFromPyList(PyMOLGlobals * G, PyObject * list, ObjectDist ** result)
{
  int ok = true;
  ObjectDist *I = NULL;
  (*result) = NULL;

  if(ok)
    ok = PyList_Check(list);

  I = new ObjectDist(G);
  if(ok)
    ok = (I != NULL);

  if(ok){
    auto *val = PyList_GetItem(list, 0);
    ok = ObjectFromPyList(G, val, I);
  }
  if(ok){
    CPythonVal *val = CPythonVal_PyList_GetItem(G, list, 2);
    ok = ObjectDistDSetFromPyList(I, val);
    CPythonVal_Free(val);
  }

  ObjectDistInvalidateRep(I, cRepAll);
  if(ok) {
    (*result) = I;
    ObjectDistUpdateExtents(I);
  } else {
    /* cleanup? */
  }

  return (ok);
}

/*========================================================================*/
int ObjectDist::getNFrame() const
{
  return DSet.size();
}


/*========================================================================*/
void ObjectDist::update()
{
  auto I = this;
  OrthoBusyPrime(I->G);
  for(int a = 0; a < I->DSet.size(); a++)
    if(I->DSet[a]) {
      OrthoBusySlow(I->G, a, I->DSet.size());
      /*           printf(" ObjectDist: updating state %d of \"%s\".\n" , a+1, I->Name); */
      I->DSet[a]->update(a);
    }
}


/*========================================================================*/
void ObjectDistInvalidateRep(ObjectDist * I, cRep_t rep)
{
  int a;
  PRINTFD(I->G, FB_ObjectDist)
    " ObjectDistInvalidateRep: entered.\n" ENDFD;

  for(a = 0; a < I->DSet.size(); a++)
    if(I->DSet[a]) {
      I->DSet[a]->invalidateRep(rep, cRepInvAll);
    }
}


/*========================================================================*/
void ObjectDist::render(RenderInfo * info)
{
  auto I = this;
  int state = info->state;
  const RenderPass pass = info->pass;
  CRay *ray = info->ray;
  auto pick = info->pick;
  bool shouldRender = false;

  if(ray || pick) {
    shouldRender = true;
  } else {
    shouldRender = pass != RenderPass::Antialias;
                               // distance measurements should render
                               // both in opaque and transparency loop,
                               // the rep decides based on transparency
                               // whether it renders in that loop.
  }
  if (!shouldRender)
    return;

  ObjectPrepareContext(I, info);
  
  for(StateIterator iter(I->G, I->Setting.get(), state, I->DSet.size());
      iter.next();) {
    DistSet * ds = I->DSet[iter.state].get();
    if(ds)
      ds->render(info);
  }
}

#if 0
static CSetting **ObjectDistGetSettingHandle(ObjectDist * I, int state)
{
  if(state < 0) {
    return (&I->Setting.get());
  } else {
    return (NULL);
  }
}
#endif

void ObjectDist::invalidate(cRep_t rep, cRepInv_t level, int state){
  auto I = this;
  for(StateIterator iter(I->G, I->Setting.get(), state, I->DSet.size());
      iter.next();) {
    DistSet * ds = I->DSet[iter.state].get();
    if(ds)
      ds->invalidateRep(rep, level);
  }
}

/*========================================================================*/
ObjectDist::ObjectDist(PyMOLGlobals * G) : pymol::CObject(G)
{
  auto I = this;
  I->type = cObjectMeasurement;
  I->DSet.reserve(10);  /* auto-zero */
  I->Color = ColorGetIndex(G, "dash");
}

ObjectDist::ObjectDist(const ObjectDist& other)
 : pymol::CObject(other)
 , DSet(other.DSet)
{
  for (auto& d : DSet) {
    if (d) {
      d->Obj = this;
    }
  }
}

ObjectDist& ObjectDist::operator=(const ObjectDist& other)
{
  pymol::CObject::operator=(other);
  DSet = other.DSet;
  for (auto& d : DSet) {
    if (d) {
      d->Obj = this;
    }
  }
  return *this;
}

/*========================================================================*/
static void ObjectDistReset(PyMOLGlobals * G, ObjectDist * I)
{
	/* This wipes out all the distance sets and clears the state */
  I->DSet.clear();
}


/*========================================================================*/
static bool checkFrozenState(PyMOLGlobals * G, int sele, int &state) {
  if (state >= 0)
    return true;

  if (sele < 0)
    return false;

  auto obj = (const pymol::CObject*) SelectorGetSingleObjectMolecule(G, sele);
  if(!obj ||
      !SettingGetIfDefined_i(G, obj->Setting.get(), cSetting_state, &state))
    return false;

  --state;
  return true;
}


/*========================================================================*/
ObjectDist *ObjectDistNewFromSele(PyMOLGlobals * G, ObjectDist * oldObj,
                                  int sele1, int sele2, int mode, float cutoff,
                                  int labels, int reset, float *result, int state,
                                  int state1, int state2)
{
  int a, mn;
  float dist_sum = 0.0, dist;
  int dist_cnt = 0;
  int n_state1, n_state2;
  int frozen1 = -1, frozen2 = -1;
  ObjectDist *I;

  /* if the distance name we presented exists and is an object, just
   * overwrite it by resetting it; otherwise intialize the
   * objectDistance and its base class */
  if(!oldObj)
    I = new ObjectDist(G);
  else {
    I = oldObj;
    if(reset)
      ObjectDistReset(G, I);
  }

  *result = 0.0;

  /* max number of states */
  mn = 0;
  SelectorUpdateTable(G, state, -1);

  /* here we determine the highest number of states with which we need to concern ourselves */
  n_state1 = SelectorGetSeleNCSet(G, sele1);
  n_state2 = SelectorGetSeleNCSet(G, sele2);
  /* take the larger state count */
  mn = (n_state2>n_state1) ? n_state2 : n_state1;

  /* updated state handling */
  frozen1 = checkFrozenState(G, sele1, state1);
  frozen2 = checkFrozenState(G, sele2, state2);

  /* FIX for incorrectly handling state=-1 for multi-molecule selections */
  if(state1<0) state1=0;
  if(state2<0) state2=0;

  if(mn) {
    /* loop over the max number of states */
    for(a = 0; a < mn; a++) {

      /* the state param is valid, set it */
      if(state >= 0) {
        if(state >= mn)  /* bail */
          break;
        a = state;  /* otherwise, set a to state */
      }

      PRINTFB(G, FB_ObjectDist, FB_Blather)
	" ObjectDistNewFromSele: obj1 is frozen = %d into state %d+1\n", frozen1, state1 
	ENDFB(G);
      PRINTFB(G, FB_ObjectDist, FB_Blather) 
	" ObjectDistNewFromSele: obj1 is frozen = %d into state %d+1\n", frozen2, state2 
	ENDFB(G);

      VecCheck(I->DSet, a);
      if(!frozen1)
	state1 = (n_state1>1) ? a : 0;
      if(!frozen2)
	state2 = (n_state2>1) ? a : 0;

      /* this does the actual work of creating the distances for this state */
      /* I->DSet[a] = new DistSet(G, selections, states, etc) -- created this new DistSet */
      if (5 <= mode && mode <= 7) {
#ifdef _PYMOL_INCENTIVE
#else
        PRINTFB(G, FB_ObjectDist, FB_Errors)
          " ObjectDist-Error: modes 5-7 only available in Incentive PyMOL\n"
          ENDFB(G);
        I->DSet[a] = nullptr;
#endif
      } else if (mode == 9) { // 9: halogen-bond interaction
        I->DSet[a].reset(pymol::FindHalogenBondInteractions(G,
            I->DSet[a].release(), sele1, state1, sele2, state2, cutoff, &dist));
      } else if (mode == 10) { // 10: salt-bridge interaction
        I->DSet[a].reset(pymol::FindSaltBridgeInteractions(G,
            I->DSet[a].release(), sele1, state1, sele2, state2, cutoff, &dist));
      } else {
        I->DSet[a].reset(SelectorGetDistSet(
            G, I->DSet[a].release(), sele1, state1, sele2, state2, mode, cutoff, &dist));
      }

      /* if the distances are valid, then tally the total and set the ObjectMolecule pointer as necessary */
      if(I->DSet[a]) {
        dist_sum += dist;	/* average distance over N states */
        dist_cnt++;
        I->DSet[a]->Obj = I;	/* point to the ObjectMolecule for this state's DistanceSet */
      }

      if(state >= 0 || (frozen1 && frozen2))
	break;
    }
  }
  /* set the object's bounds and redraw */
  ObjectDistUpdateExtents(I);
  ObjectDistInvalidateRep(I, cRepAll);

  /* return the avg dist */
  if(dist_cnt)
    (*result) = dist_sum / dist_cnt;

  SceneChanged(G);
  return (I);
}

ObjectDist *ObjectDistNewFromAngleSele(PyMOLGlobals * G, ObjectDist * oldObj,
                                       int sele1, int sele2, int sele3, int mode,
                                       int labels, float *result, int reset, int state,
                                       int state1, int state2, int state3)
{
  int a, mn;
  float angle_sum = 0.0;
  int angle_cnt = 0;
  int n_state1, n_state2, n_state3;
  ObjectDist *I;

  int frozen1=-1, frozen2=-1, frozen3=-1;
  if(!oldObj)                   /* create object if new */
    I = new ObjectDist(G);
  else {                        /* otherwise, use existing object */
    I = oldObj;
    if(reset) {                 /* if reseting, then clear out all existing coordinate sets */
      ObjectDistReset(G, I);
    }
  }
  *result = 0.0;

  /* count number of states in each selection */

  SelectorUpdateTable(G, state, -1);
  n_state1 = SelectorGetSeleNCSet(G, sele1);
  n_state2 = SelectorGetSeleNCSet(G, sele2);
  n_state3 = SelectorGetSeleNCSet(G, sele3);

  /* figure out the total number of states */

  mn = std::max({n_state1, n_state2, n_state3});

  /* updated state handling */
  frozen1 = checkFrozenState(G, sele1, state1);
  frozen2 = checkFrozenState(G, sele2, state2);
  frozen3 = checkFrozenState(G, sele3, state3);

  if(mn) {
    for(a = 0; a < mn; a++) {
      if(state >= 0) {
        if(state > mn)
          break;
        a = state;
      }
      /* treat selections with one state as static singletons */

      PRINTFB(G, FB_ObjectDist, FB_Blather)
	" ObjectDistNewFromAngleSele: obj1 is frozen = %d into state %d+1\n", frozen1, state1 
	ENDFB(G);
      PRINTFB(G, FB_ObjectDist, FB_Blather) 
	" ObjectDistNewFromAngleSele: obj2 is frozen = %d into state %d+1\n", frozen2, state2 
	ENDFB(G);
      PRINTFB(G, FB_ObjectDist, FB_Blather) 
	" ObjectDistNewFromAngleSele: obj3 is frozen = %d into state %d+1\n", frozen3, state3
	ENDFB(G);

      if(!frozen1)
	state1 = (n_state1>1) ? a : 0;
      if(!frozen2)
	state2 = (n_state2>1) ? a : 0;
      if(!frozen3)
	state3 = (n_state3>1) ? a : 0;

      VecCheck(I->DSet, a);
      I->DSet[a].reset(SelectorGetAngleSet(G, I->DSet[a].release(), sele1, state1, sele2,
                                       state2, sele3, state3, mode, &angle_sum,
                                       &angle_cnt));

      if(I->DSet[a]) {
        I->DSet[a]->Obj = I;
      }
      if(state >= 0 || (frozen1 && frozen2 && frozen3))
        break;
    }
  }
  /* else {
     VLAFreeP(I->DSet);
     DeleteP(I);
     }
   */
  ObjectDistUpdateExtents(I);
  ObjectDistInvalidateRep(I, cRepAll);
  if(angle_cnt)
    (*result) = angle_sum / angle_cnt;

  SceneChanged(G);
  return (I);
}

ObjectDist *ObjectDistNewFromDihedralSele(PyMOLGlobals * G, ObjectDist * oldObj,
                                          int sele1, int sele2, int sele3, int sele4,
                                          int mode, int labels, float *result,
                                          int reset, int state)
{
  int a, mn;
  float angle_sum = 0.0;
  int angle_cnt = 0;
  int n_state1, n_state2, n_state3, n_state4;
  int state1 = -1, state2 = -1, state3 = -1, state4 = -1;
  ObjectDist *I;

  int frozen1=-1, frozen2=-1, frozen3=-1, frozen4=-1;

  if(!oldObj)                   /* create object if new */
    I = new ObjectDist(G);
  else {                        /* otherwise, use existing object */
    I = oldObj;
    if(reset) {                 /* if reseting, then clear out all existing coordinate sets */
      ObjectDistReset(G, I);
    }
  }
  *result = 0.0;

  /* count number of states in each selection */

  SelectorUpdateTable(G, state, -1);

  n_state1 = SelectorGetSeleNCSet(G, sele1);
  n_state2 = SelectorGetSeleNCSet(G, sele2);
  n_state3 = SelectorGetSeleNCSet(G, sele3);
  n_state4 = SelectorGetSeleNCSet(G, sele4);

  /* figure out the total number of states */

  mn = n_state1;
  if(n_state2 > mn)
    mn = n_state2;
  if(n_state3 > mn)
    mn = n_state3;
  if(n_state4 > mn)
    mn = n_state4;

  /* updated state handling */
  frozen1 = checkFrozenState(G, sele1, state1);
  frozen2 = checkFrozenState(G, sele2, state2);
  frozen3 = checkFrozenState(G, sele3, state3);
  frozen4 = checkFrozenState(G, sele4, state4);

  if(mn) {
    for(a = 0; a < mn; a++) {
      if(state >= 0) {
        if(state > mn)
          break;
        a = state;
      }
      /* treat selections with one state as static singletons */

      if(!frozen1)
	state1 = (n_state1>1) ? a : 0;
      if(!frozen2)
	state2 = (n_state2>1) ? a : 0;
      if(!frozen3)
	state3 = (n_state3>1) ? a : 0;
      if(!frozen4)
	state4 = (n_state4>1) ? a : 0;

      VecCheck(I->DSet, a);
      I->DSet[a].reset(SelectorGetDihedralSet(G, I->DSet[a].release(), sele1, state1, sele2,
                                          state2, sele3, state3, sele4, state4,
                                          mode, &angle_sum, &angle_cnt));

      if(I->DSet[a]) {
        I->DSet[a]->Obj = I;
      }

      if(state >= 0 || (frozen1 && frozen2 && frozen3 && frozen4))
        break;
    }
  }
  /* else {
     VLAFreeP(I->DSet);
     DeleteP(I);
     }
   */
  ObjectDistUpdateExtents(I);
  ObjectDistInvalidateRep(I, cRepAll);

  if(angle_cnt)
    (*result) = angle_sum / angle_cnt;

  SceneChanged(G);
  return (I);
}

pymol::CObject* ObjectDist::clone() const
{
  return new ObjectDist(*this);
}